where \(A=0\)  represents the group which may be discriminated (also called minority group) with respect to the algorithm.
Thus, the smaller the value, the stronger the discrimination against the minority group; while a \(DI(f) = 1\)  score means that Statistical Parity is reached. A threshold \(\tau _0=0.8\)  is commonly used to judge whether the discrimination level of an algorithm is acceptable [1]}, [2]}, [3]}.
